Snow on average begins forming on Japan's highest mountain on October 2 and the latest it had been detected before this year was in 1955 and 2016, when it fell on October 26.

"Rain is likely to fall temporarily near Mount Fuji on November 6," forecasting website tenki.jp, run by the Japan Weather Association, said on Thursday.

"Cold air will move in and change from rain to snow near the summit," it said. "The weather will gradually clear up, and the first snow on the mountain may be observed on the morning of the 7th."

Another company Weather News also said Wednesday that "the first snowfall is likely to be pushed back to November".

At Lake Kawaguchi, a favourite viewing spot for the volcano, French visitor Hugo Koide told AFP it was "quite shocking to see at this time of year there's no snow."

The 25-year-old, who used to visit the area in autumn in his childhood, said he remembered how Fuji "was always covered by snow."

"I'm rocking up in T-shirt and shorts. It kind of doesn't feel the same," said Australian traveller Jason Le.

"I think that across the globe it is kind of affecting everybody. We're from Australia and what you are seeing is it is getting hotter in the summer months and it's getting colder earlier," he told AFP.

Last year snow was first detected on Fuji on October 5.

Yutaka Katsuta, a forecaster in the town of Kofu's meteorological office, told AFP on Monday climate change may play a role in delaying snowfall, with this year being the latest since comparative data became available in 1894.

"Temperatures were high this summer, and these high temperatures continued into September, deterring cold air (bringing snow)," Katsuta told AFP.

Japan's summer this year was the joint hottest on record -- equalling the level seen in 2023 -- as extreme heatwaves fuelled by climate change engulfed many parts of the globe.

Warm weather has been affecting other snowy regions across the globe, with many ski resorts increasingly being forced to confront the realities of a warming climate.

In Japan the city of Sapporo in the normally chilly northern island of Hokkaido, has begun discussing scaling down its famous snow festival due to a shortage.